Question

What does principal quantum number says about the atom ?​

Answer 1

The Principal Quantum No.(n) tells the shell/energy level in which a particular electron is present in an atom.

Answer 2

Answer:

The principal quantum number, n, describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the orbital and the energy level an electron is placed in. The number of subshells, or l, describes the shape of the orbital.

Explanation: